<VV> Overdrive Transmissions
BobHelt at aol.com
BobHelt at aol.com
Fri Oct 30 11:19:00 EDT 2015
May I suggest that Richard has a great idea here. I don't know just how his
suggestion might work in actual implemetation but the conncept has merit.
All of the LM engines have a torque peak around 2200-2400 rpm (except maybe
the 140hp and turbo) so what bad effects could possibly arise from reving
the engine at a lower speed and still be over the torque peak in top gear.?
For lower speeds, the lower gears would be appropriate. Normal crusing at,
say, 60 mph would likely drop from around 3000 rpm (way past the torque
peak) to around 2400 rpm...right at the torque curve peak. Any acceleration
from that speed would be from max torque. If greater speeds are desired then
the available engine torque would still be greater than without the 5th
gear. If you are still worried, just rebuild your engine using the 95 hp cam
or Clark's OT10 cam that the aircraft boys use to obtain max torque under
3000 rpm.
Bob Helt
In a message dated 10/30/2015 7:52:51 A.M. US Mountain Standard Time,
virtualvairs at corvair.org writes:
Richard, when you were taught that, did they also throw out there that to
run engines at lower RPM's you also needed to change the torque curve
through cam timing adjustments and change the internal components of the
engines, too. Neither of which we have had discussions about and cannot do
on the Corvair engines, the parts are not available and would be expensive
to build.
More information about the VirtualVairs
mailing list